Active Carbon Filters Ltd provides independently tested Nitrosorb® NOx filters as the best solution for improving air quality in homes, businesses, schools, and mixed-use buildings in the UK. Our MCERTS-verified, high-efficiency systems meet Clean Air for Europe (CAFE) Directive requirements, protect occupant health from road traffic pollution, and provide planners with proven compliance assurance. With cutting-edge Nitrosorb® technology, bespoke design options, and comprehensive installation support nationwide, ACF Nitrosorb® is trusted across the UK building services market.

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ACF Nitrosorb® NO₂ & NOx Filtration for UK Indoor Air Quality

Active Carbon Filters Ltd delivers independently tested, cutting-edge Nitrosorb® NOx filter systems designed to protect residents from harmful road traffic pollution across the UK. Our high-efficiency filtration reduces dangerous NO₂ levels (>40 µg/m³) to safe values, meeting Clean Air for Europe (CAFE) Directive requirements. With proven performance, Colourcell® visual indicators, bespoke design options, and 2-5 year media life, we provide the definitive mitigation solution for UK residential, commercial, and educational developments in Air Quality Management Areas.

Stock Available + Fast Delivery

High NO₂/NOₓ & PM₂.₅ Removal Efficiency

2-5 Year Media Life with Refillable Cells

Bespoke Design Options Available

_______ Why Choose ACF Nitrosorb®

Property developers, architects, and planners across the UK must meet Clean Air for Europe (CAFE) Directive requirements in Air Quality Management Areas where road traffic creates dangerous NO₂ concentrations exceeding 40 µg/m³. ACF Nitrosorb® filters deliver proven, independently tested mitigation for residential, commercial, and educational buildings, protecting occupant health while ensuring planning compliance through MCERTS-verified performance.

Independently Tested Solutions Trusted by UK Planners

Proven NO₂ & NOx Removal Performance

ACF Nitrosorb® media delivers high‑efficiency removal of nitrogen dioxide (NO₂) and NOx pollutants from road traffic and diesel engines, reducing harmful ambient concentrations to safer levels for dwelling occupants.

EU CAFE Directive Compliance Guaranteed

Purpose‑built to meet planning regulations in line with the EU Clean Air for Europe (CAFE) Directive, providing verifiable mitigation measures for developments in high‑pollution urban areas.

Visual Maintenance Indicators Built‑In

Colourcell® media changes colour as it saturates, visible through underside access panel windows. Know exactly when replacement is needed without guesswork, with media life lasting 2 to 5 years.

Flexible Installation for Any Space

Available in standard units or bespoke designs for shallow ceiling voids. Install vertically in service cupboards or horizontally in ceiling voids, with both configurations ensuring effective pollutant removal.

_______ What We Do

ACF Nitrosorb® Solutions for Residential, Commercial, and Educational Projects

Across UK Air Quality Management Areas, property developers, planners, and building services engineers require independent, proven NO₂ filtration solutions. Whether it's for homes, offices, schools, or buildings with multiple uses, ACF Nitrosorb® offers tested filtration that meets planning rules and protects the health of those inside. Our flexible standard and bespoke designs ensure effective installation in any building type.

Standard ACF Nitrosorb® Units

Our proven standard range units install vertically in service cupboards or horizontally in ceiling voids with underside access panels. They deliver high‑efficiency removal of NO₂, NOx, and PM₂.₅ pollutants, with built‑in ColourCell® visual indicators. Stock availability ensures fast project delivery when planning approval is at stake.

Bespoke ACF Nitrosorb® Designs

Shallow ceiling voids? Unusual plant room configurations? We custom‑design ACF Nitrosorb® units to fit your exact spatial constraints without compromising filtration performance. Purpose‑engineered solutions for developments where standard dimensions are unsuitable.

Full Installation & Servicing Support

Our experienced team of installation and service engineers handles everything from initial unit mounting to long‑term media replacement. With 2–5 year media life and environmentally friendly, plastic, refillable filter cells, you replace only the media, not the entire unit, which reduces waste and ongoing costs.

_______ About ACF Nitrosorb®

Market Leader in Independently Tested NOx Filtration

Active Carbon Filters Ltd is the UK market leader in Nitrosorb® NOx filter technology, delivering independently MCERTS-tested solutions for indoor air quality. Our Nitrosorb® systems are designed to help meet the Clean Air for Europe (CAFE) Directive in areas that manage air quality, and they have kept people safe in homes, businesses, and schools all over the country. With over 16,000 units installed from our UK manufacturing facility near Birmingham, we combine proven high-efficiency NO₂ and NOx reduction with Colourcell® visual indicators, bespoke design capability, and comprehensive installation support. ACF Nitrosorb® is the trusted choice for UK planners, developers, and mechanical consultants seeking proven, independently verified air quality mitigation.

_______ Get Expert Support Today

Ready to Meet Your Planning Requirements with Proven NO₂ Removal?

Fill out our form to discuss ACF Nitrosorb® solutions for your urban development. From bespoke unit design to full installation support, we guide you through EU CAFE Directive compliance, from planning approval to resident move‑in.

_______ How It Works

Three Steps to EU CAFE Directive Compliance

1

Share Your Requirements

Provide dwelling specifications, ceiling void dimensions, and pollution mitigation needs through our simple form.

2

Receive Your Custom Quote

We analyse your project and recommend standard or bespoke ACF Nitrosorb® units, with a 10% discount applied and delivery timelines confirmed.

3

Fast Installation Support

Units ship quickly (stock items available), with full installation and commissioning support from our experienced engineers.

_______ Special Offer

10% Off ACF Nitrosorb® for New Residential Developments

Secure high‑performance NO₂ and NOx reduction for your urban development at 10% below standard rates. This limited offer applies to new residential development enquiries requiring compliance with the EU Clean Air for Europe (CAFE) Directive.

_______ Key Features

Comprehensive Features for Clean Air Compliance

Independently, MCERTS tested and verified.
Suitable for residential, commercial, and educational applications.
Suitable for both new-build and retrofit schemes.
Widely accepted by planners in Air Quality Management Areas.
Recommended by leading UK air quality consultants.
Routinely specified by mechanical consulting engineers.
Compatible with MVHR units and centralised Air Handling plant.
Designed to deliver consistently low pressure drop.
ACF Colourcell® filter system with transparent viewing panel.